Get money off your solar and battery installation

Santander mortgage and personal current account customers who get their solar panels installed through Octopus will receive a £1000 discount off their purchase price when place an order by 23.59 on 31st July 2024. Offer can be withdrawn at any time.

You could also get up to £500 home energy cashback from Santander if you borrow money from Santander to make energy-efficient home improvements using their trusted suppliers, including Octopus Energy. Offer available to Santander mortgage and personal current account customers only. £250 home energy cashback if you borrow between £5,000 and £9,999. £500 home energy cashback if you borrow £10,000 or more. Terms and conditions apply. Any money borrowed on your mortgage will be secured against your home. All loan applications are subject to status. If you would like to find out more about the home energy cashback Santander has available and the options to borrow the money you need for improvements, please visit https://www.santander.co.uk/personal/support/greener-living/greener-homes/green-improvements. Cashback offer can be withdrawn at any time.

If you’re happy with the initial quote, we will take a fully refundable £200 deposit, arrange a survey and review of your property before giving you a date for your installation. The £1000 discount is then taken off your final sales agreement price with Octopus.

Average costs

The cost of installation can depend on how many panels you need, whether you choose to have battery storage, and what size of battery you require. The cost of a panel-only installation by Octopus starts from £3,880 (for 2 panels). A 10 panel installation and a 5kWh battery (our most popular system) costs £9,199. We'll ask you to pay a fully refundable deposit of £200 when you agree to your quote, then the remaining balance can be paid after install.

What does a standard installation include?

Your quote will be inclusive of your chosen number of solar panels and battery option, microinverters (if necessary), bird protection and all other electrical components required to complete the install. Plus scaffolding, delivery and labour costs, and our 5-star customer support from start to finish.

How long will it take for the panels to pay for themselves?

Our systems typically pay for themselves in 9 - 11 years.

We compared the typical installation cost and annual bill savings for our most common solar system (10 panels, 5kWh) in 5 different scenarios. The payback period varied from 9 - 11 years depending on the energy tariff.

Of course, each home is unique and this can be influenced by lots of different factors.

We’ll calculate a personalised payback period following our design consultation, to let you know what you might save for your home.

For an Octopus solar installation, you will need to own your home, and you will need a clear space on a pitched roof (aka not flat) that can fit at least 2 solar panels.

Please note that we're not able to install solar for flats or properties with a 3 phase electricity meter just yet. And at present we are only able to install system systems on roofs with clay or concrete roof tiles.

It's important that this part of your roof sees the sun throughout the day, so a north facing roof will generate less power, and could be unsuitable. We'll also need to be able to install scaffolding below the roof where the panels will be fitted in order to complete the installation.

If Octopus are unable to install solar at your home, we may be able to recommend an Octopus Trusted Trader to complete the job for you, with equivalent care and quality.

On your roof, the number of panels we recommend will depend on the amount of space you have and how much energy you use.

Our panels are 1.7m length 1.1m wide each, and we'll need space for a 40cm gap between the edge of the roof and the solar system. The average number of panels is around 10-12 (4.5kW) and the minimum number we can fit is 2.

In general, the more panels on the roof, the more electricity you will generate, so we’d only recommend a large array if your usage is high. We’ll discuss all of these options with you.

We now install microinverters as standard, which don’t require space inside your home inside your home. However if we are installing a GivEnergy system, you will need space for an inverter measuring: (HxDxW) 440 x 260 x 480 (mm).

If you choose to also have a battery, these come in several sizes:

Enphase

5kWh dimensions: (HxDxW) 980 x 188 x 550 (mm)

10kWh will be 2 of the batteries specified above, and will require a space of 150mm between each battery.

GivEnergy

5.2kWh dimensions: (HxDxW) 515 x 220 x 480 (mm)

9.5kWh dimensions: (HxDxW) 800 x 223 x 480 (mm)

Our expert team is committed to choosing the best quality products for our customers, to ensure that you get the best efficiency, and ultimately make the best savings with your solar installation.

Our solar packages are installed with state-of-the-art 440W PV solar panels from JA Solar, and the IQ8 Microinverter from Enphase as standard.

For all battery installations, we will offer the industry-leading Enphase IQ Battery 5P as standard. For a 5kWh system, we will install one battery, and for a 10kWh installation, we will install 2 batteries.

However Enphase intallation is subject to DNO approval, and if we find that this product isn’t suitable for your home, we will offer a suitable alternative for both your battery and inverter, without ever compromising on quality.

Find out more about panels and inverters here.

Enphase battery benefits:

• Fully integrated AC battery system
• Embedded IQ8D-BAT Microinverters
• Field-replaceable components 
• Stable lithium iron phosphate (LFP) chemistry for maximum safety and longevity
• Cools passively with no moving parts or fans 
• Uses wired communication for fast and consistent connection
• Quick and easy plug-and-play installation
• Remote software and firmware upgrades
• Offers homeowners remote monitoring and control from the Enphase App

All of our equipment comes with a manufacturer warranty:

• Solar Panels: 25 years product warranty and 30 years linear power warranty.
• Inverter: Enphase Microinverters come with a product warranty of 25 years, whilst the GivEnergy inverter is covered by a 12 year product warranty.
• Batteries: 12 years for GivEnergy products and 15 years for Enphase products.

Our customers are also protected by a 2 year Workmanship Warranty Insurance scheme.

Cut up to 91% off your electricity bills

We compared the annual cost a typical household would pay for their electricity on the July '24 price cap - £1,002, to what they would pay with a 10 solar panel & 5kWh battery system (our most popular system) on our Octopus Flux tariff - £93. This is a saving of £909 or 91% of your total electricity bill.

In this table, you can check out the typical costs, savings and payback period for an average customer with our most popular system size (10 solar panel & 5kWh battery). Check out this blog for more on solar savings and a more detailed explanation of our calculation.

Solar installations from £3,880

Our prices start at £3,880 for a 2 panel installation with no battery.

The UK’s highest export rates

Compared to other suppliers, Octopus export rates on Octopus Flux and Intelligent Octopus Flux are significantly higher.

Interested in solar and battery installation?

Call us: 0808 196 6842

Email: solar@octopus.energy

(Our phone lines are open 9am - 5pm Monday to Thursday, and 9am - 4pm Friday.)

Need support after installation?

Call us: 0808 175 1696

Email: solar@octopus.energy

(Our aftercare phone line is open 8am – 8pm Monday to Saturday, 10am - 6pm Sunday, and we answer emails 7 days a week)

Have a complaint?

For the fastest response, fill out this form to raise any issues. Alternatively, you can email us on solar@octopus.energy or call 0808 196 6842.

If you require extra help with setting up your export tariff and supply, please email export@octopus.energy.

Please note, if you’re having problems with a solar system that wasn’t installed by us, please seek advice directly from the manufacturer.